Class TGrayscaleAlphaImage

Unit

CastleImages

Declaration

type TGrayscaleAlphaImage = class(TCastleImage)

Description

Grayscale image with an alpha channel. Each pixel is two bytes: grayscale + alpha.

Hierarchy

• TObject
• TEncodedImage
• TCastleImage
• TGrayscaleAlphaImage

Overview

Methods

	procedure DrawFromCore(Source: TCastleImage; X, Y, SourceX, SourceY, SourceWidth, SourceHeight: Integer; const Mode: TDrawMode); override;
	function GetColors(const X, Y, Z: Integer): TCastleColor; override;
	procedure SetColors(const X, Y, Z: Integer; const C: TCastleColor); override;
	class function PixelSize: Cardinal; override;
	class function ColorComponentsCount: Cardinal; override;
	function PixelPtr(const X, Y: Cardinal; const Z: Cardinal = 0): PVector2Byte;
	function RowPtr(const Y: Cardinal; const Z: Cardinal = 0): PArray_Vector2Byte;
	procedure InvertColors; override;
	procedure Clear(const Pixel: TVector4Byte); override;
	function IsClear(const Pixel: TVector4Byte): boolean; override;
	procedure Clear(const Pixel: TVector2Byte); reintroduce;
	function IsClear(const Pixel: TVector2Byte): boolean; reintroduce;
	function HasAlpha: boolean; override;
	function AlphaChannel( const AlphaTolerance: Byte): TAlphaChannel; override;
	procedure LerpWith(const Value: Single; SecondImage: TCastleImage); override;
	class procedure MixColors(const OutputColor: Pointer; const Weights: TVector4Single; const AColors: TVector4Pointer); override;
	procedure Assign(const Source: TCastleImage); override;

Properties

property GrayscaleAlphaPixels: PVector2Byte read GetGrayscaleAlphaPixels;

Description

Methods

	procedure DrawFromCore(Source: TCastleImage; X, Y, SourceX, SourceY, SourceWidth, SourceHeight: Integer; const Mode: TDrawMode); override;

	function GetColors(const X, Y, Z: Integer): TCastleColor; override;

	procedure SetColors(const X, Y, Z: Integer; const C: TCastleColor); override;

	class function PixelSize: Cardinal; override;

	class function ColorComponentsCount: Cardinal; override;

	function PixelPtr(const X, Y: Cardinal; const Z: Cardinal = 0): PVector2Byte;

	function RowPtr(const Y: Cardinal; const Z: Cardinal = 0): PArray_Vector2Byte;

	procedure InvertColors; override;

	procedure Clear(const Pixel: TVector4Byte); override;

	function IsClear(const Pixel: TVector4Byte): boolean; override;

	procedure Clear(const Pixel: TVector2Byte); reintroduce;

	function IsClear(const Pixel: TVector2Byte): boolean; reintroduce;

	function HasAlpha: boolean; override;

	function AlphaChannel( const AlphaTolerance: Byte): TAlphaChannel; override;

	procedure LerpWith(const Value: Single; SecondImage: TCastleImage); override;

	class procedure MixColors(const OutputColor: Pointer; const Weights: TVector4Single; const AColors: TVector4Pointer); override;

	procedure Assign(const Source: TCastleImage); override;

Properties

	property GrayscaleAlphaPixels: PVector2Byte read GetGrayscaleAlphaPixels;
This is the same pointer as RawPixels, only typecasted to PVector2Byte